JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.
This product is available at our retail partners. You can also find replacement parts and outlet items in our Outlet and Parts Store.
Reef Endurance Magnesium Chloride is a pharmaceutical-based aquarium supplement that mixes crystal clear with no unwanted impurities. In reef aquaria, maintaining a proper magnesium level of 1200-1350ppm helps achieve the essential balance of calcium and alkalinity in the aquarium by preventing excess calcium carbonate precipitation. For best results, use in conjunction with Reef Endurance Magnesium Sulfate for a complete balance.
1gal RO/DI + 5-1/4 Cups of Magnesium Chloride + 2 Cups of Magnesium Sulfate
2ml/gallon of Magnesium Chloride Solution will raise magnesium by approximately 25ppm. It is not recommended to increase magnesium by more than 50ppm per day.
Tip: If you are having issues raising your alkalinity levels, check and ensure your aquarium magnesium level is between 1200 and 1350ppm.